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ATX Power On

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  • ATX Power On

    How do you all power your ATX motherboards automagically everytime?

    I have no "Startup automatically after power loss", shorting pins 13/14 or permanently shorting the "Power On" cable only creates a reboot loop. I ran phone cable from my dash where the buttons are to the Power On jumper on the mobo, and it couldn't get a signal. I may need a battery in there to boost the signal. I'm out of ideas and couldn't turn up anything in a search. Any ideas?
    Don't Click

  • #2
    Re: ATX Power On

    hrm... extending the wires worked for me..... and I cant see why it would not work for you.... unless the wire you used had a REALLY high resistance.....

    I dont need it anymore since I have the 'after power loss' option in my BIOS......
    Project - GAME OVER :(


    • #3
      A small timer circuit and a small relay can be used to "bump" the power switch after power on. Check some of the datasheets or application books for the 555 timer.
      Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists
      Car: 1986 Mazda RX-7 Turbo (highly modded), 1978 RX-7 Beater (Dead, parting out), 2001 Honda Insight
      "If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."


      • #4
        I had used 4 wire phone cable which must have had higher resistance than I thought. I switched to stranded speaker cable and now it works perfectly.
        Don't Click


        • #5
          good for you! always run a bunch more cables than you need!

          bunch<- learn to spell
          My cars